Subversion Repositories HelenOS-historic

Rev

Rev 1264 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
10 jermar 1
/*
2
 * Copyright (C) 2005 Jakub Jermar
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1264 jermar 29
/**
30
 * @file    ipi.c
31
 * @brief   Generic IPI interface.
32
 */
33
 
458 decky 34
#ifdef CONFIG_SMP
10 jermar 35
 
36
#include <smp/ipi.h>
37
#include <config.h>
38
 
107 decky 39
 
40
/** Broadcast IPI message
41
 *
42
 * Broadcast IPI message to all CPUs.
43
 *
44
 * @param ipi Message to broadcast.
45
 *
1288 jermar 46
 * @bug The decision whether to actually send the IPI must be based
47
 *  on a different criterion. The current version has
48
 *  problems when some of the detected CPUs are marked
49
 *  disabled in machine configuration.
107 decky 50
 */
10 jermar 51
void ipi_broadcast(int ipi)
52
{
53
    /*
54
     * Provisions must be made to avoid sending IPI:
55
     * - before all CPU's were configured to accept the IPI
458 decky 56
     * - if there is only one CPU but the kernel was compiled with CONFIG_SMP
10 jermar 57
     */
58
 
59
    if ((config.cpu_active > 1) && (config.cpu_active == config.cpu_count))
60
        ipi_broadcast_arch(ipi);
61
}
62
 
458 decky 63
#endif /* CONFIG_SMP */